Trex 700 and Plettenberg HP 370/40/A2 motor

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Home › ✈️Aircraft › 🚁Helicopter › Aerial Photography and Video › Trex 700 and Plettenberg HP 370/40/A2 motor

09-18-2009 08:08 AM 11 years ago

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Trex_Cam

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Trex 700 and Plettenberg HP 370/40/A2 motor

we have seen that this motor works with maxi joker 2 at good performance. At same Gear ratio (1:10.9) we used this motor with trex 700 and connected 5kg. camera mount for aerial video. you will find photos taken with this below. But we have some problems.

first of all motor overheated. is gear ratio ideal for this type of operation? if not what is the ideal flight weight and gear ratio?

[img] /fastphoto/79183/IMG_0933.jpg [desc]
[img] /fastphoto/79183/IMG_0931.jpg [desc]

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09-18-2009 09:03 AM 11 years ago

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chris24g

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since the 370 is an inrunner, cool air getting to the motor will be very important. jokers have the motor inverted and outside the canopy in cool air.

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09-18-2009 10:54 AM 11 years ago

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Seablade

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How is the airflow into the top, or in your case, the bottom of the motor? You see where it is on the Jokers sticking right up through the top of the canopy with no obstructions. Yours looks a bit stifled."Vini, Vidi, Velcro"

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09-18-2009 11:59 AM 11 years ago

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Trex_Cam

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But we don't use any canopy in this system.

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09-18-2009 12:10 PM 11 years ago

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cranester

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Whats your head speed with that gearing? I fly my t rrex with 3 -4 kg at 1800/1900 head speed and it runs very cool, motor is a Z-Power 560Kv and I use a 13T pinion

Two of your images are not workingJuan Crane

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09-18-2009 12:19 PM 11 years ago

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nooobs

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09-18-2009 12:20 PM 11 years ago

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Trex_Cam

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We use 12S Align 5200
and we use trex stock Main gear and 15T pinion.

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09-18-2009 12:25 PM 11 years ago

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Trex_Cam

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Which turn direction is true of motor when is runing?
A or B?

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09-18-2009 12:38 PM 11 years ago

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cranester

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Direction is irrelevant, it can run both directions.
What's your head speed, if its to low, the heli may require alot of pitch to fly and the motor can overheat.Juan Crane

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09-18-2009 12:48 PM 11 years ago

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nooobs

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09-18-2009 01:01 PM 11 years ago

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Trex_Cam

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Our head speed about 1800 rpm.
We will try 10S lipo.

direction is not irrelevant because you can see in picture for cooling fan direction.

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09-18-2009 02:24 PM 11 years ago

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DTM

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I think your gearing is wrong, you should have around 1400 rpm imho. But from the looks of you pinion gear, you are stuck there. I also have some reservations about hauling 5 kg on a single gear reduction and a pinion that looks like it has a wall thickness of 1.5mm...

Are you sure the Joker had a reduction of 1:10? For that motor I'd opt for 1:13.

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09-18-2009 03:13 PM 11 years ago

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cranester

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Yeah that pinion looks scrayJuan Crane

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09-19-2009 09:54 PM 11 years ago

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iflybyu77

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1400rpm on 700mm blades is probably a little low. I'd target 1500-1600.

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09-19-2009 10:14 PM 11 years ago

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ßeta

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ToonTown

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That motor is old school.... get rid of it and get a Xera outrunner. It'll run about considerably cooler than that Pletty.

And that pinion is just whacked. no wall thickness to speak of. accident waiting to happen.

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09-20-2009 12:42 AM 11 years ago

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Seablade

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I was wondering if you could fill the center of the pinion with electrical solder or epoxy to give it some more strength?"Vini, Vidi, Velcro"

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09-20-2009 12:56 AM 11 years ago

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chris24g

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Nothing wrong with old school.

What the plettenberg has is a solid track record and reputable manufacturing. When you have 5 grand in the air, you don't want to think about whether all the production defects have been identified for a new component by a company new to the game.

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09-21-2009 09:35 AM 11 years ago

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DTM

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1400rpm on 700mm blades is probably a little low. I'd target 1500-1600.

Agreed, I was thinking 800 mm blades. (which would probably also be an improvement)

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09-27-2009 09:47 PM 11 years ago

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signwiz

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Lexington, KY

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^^^ ignorant about electric helicopters ^^^

I'm reading and learning...Give me more time. Alot goes into a heavy lifting machine and have 10,000 in the air with my number one machine not including camera gear....shesh, I m really working hard to understand all of this and having limited time to study, Not a walk in the park, "Cheers" to all that share this great info!!!!

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